UK sells GBP 3.25bln 4.625% 2037 Green Gilt: b/c 3.38x (prev. 3.31x), average yield 5.268% (prev. 4.934%) & tail 0.3bps (prev. 0.2bps)

UK sells GBP 3.25bln 4.625% 2037 Green Gilt: b/c 3.38x (prev. 3.31x), average yield 5.268% (prev. 4.934%) & tail 0.3bps (prev. 0.2bps)

A covered auction printing a bid-to-cover above the prior sale of the line with a tail of fractions of a basis point reads as clean absorption: in past episodes of this kind, the distinction that matters is between demand-led strength and concession-led strength, and a sub-half-basis-point tail points to the former, since buyers came in near the prevailing level rather than extracting a cheapening. Long-dated gilt demand has historically rested on liability-driven accounts and pension hedging flows, so b/c at this maturity tends to reflect structural rather than fast-money interest; genuinely weak long-end auctions in the past have shown up as wide tails and immediate post-auction cheapening, neither of which applies here. The higher average yield versus the previous sale is a function of the rate backdrop between the two auctions rather than of demand for this specific line, and comparing yields across sales of the same gilt is usually less informative than the tail and cover. Green lines have tended to attract a dedicated buyer base on top of the conventional one, and the greenium that once featured in pricing these has generally compressed as the programme has matured, leaving results that behave much like conventional supply. Follow-ons worth noting are secondary performance in the hours after the strike, the size of the post-auction concession versus pre-auction cheapening, and where this sale sits in the remit for the quarter, since heavy upcoming supply is the usual reason strong covers fail to hold. As a single result, the signal is that duration demand at the long end remains intact at these levels.